First experimental determination of the charge radius of $^{74}$Rb and its application in tests of the unitarity of the CKM matrix

Details First experimental determination of the charge radius of $^{74}$Rb and its application in tests of the unitarity of the CKM matrix First experimental determination of the charge radius of $^{74}$Rb and its application in tests of the unitarity of the CKM matrix

2011-10-07

arxiv.org/abs/1110.1656v1

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

Collinear-laser spectroscopy with bunched-beams technique was used for the study of neutron deficient Rb isotopes, out to $^{74}$Rb ($N=Z=37$) at TRIUMF. The measured hyperfine coupling constants of $^{76,78m}$Rb were in agreement with literature values. The nuclear spin of $^{75}$Rb was confirmed to be $I=3/2$, and its hyperfine coupling constants were measured for the first time. The mean-square charge radius of $^{74}$Rb was determined for the first time. This result has improved the isospin symmetry breaking correction term used to calculate the $\mathcal{F}t$ value, with implications for tests of the unitarity of the Cabibbo-Kobayashi-Maskawa matrix.

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